Question : Directions: Three of the following four triads are alike in a certain way as they are formed by performing the same mathematical operations among themselves and thus form a group. Which triad does NOT belong to that group?
Option 1: 36 : 13 : 7
Option 2: 16 : 9 : 5
Option 3: 72 : 16 : 8
Option 4: 1 : 3 : 2
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Correct Answer: 72 : 16 : 8
Solution : Let's check the options – First option: 36 : 13 : 7→36 + 13 = 49; (7)2 = 49 Second option: 16 : 9 : 5→16 + 9 = 25; (5)2 = 25 Third option: 72 : 16 : 8→72 + 16 = 88; (8)2 = 64 ≠ 88 Fourth option: 1 : 3 : 2→1 + 3 = 4; (2)2 = 4
So, only for the third option the sum of the first two numbers is not equal to the square of the third number. Hence, the third option is correct.
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Option 1: 24 : 25 : 5
Option 2: 35 : 36 : 6
Option 3: 8 : 15 : 3
Option 4: 3 : 10 : 2
Option 1: 12 : 47 : 60
Option 2: 4 : 16 : 20
Option 3: 2 : 7 : 10
Option 4: 5 : 19 : 25
Question : Directions: Three of the following four triads are alike in a certain way as they are formed by performing the same mathematical operations among themselves and thus form a group. Which triad does not belong to that group?
Option 1: 11 : 21 : 121
Option 2: 2 : 3 : 4
Option 3: 7 : 15 : 49
Option 4: 9 : 17 : 81
Option 2: 7 : 15 : 49
Option 3: 2 : 3 : 4
Option 1: 2 : 5 : 8
Option 2: 5 : 10 : 125
Option 3: 12 : 25 : 1728
Option 4: 3 : 7 : 27
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